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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 418 | if ( ! isset( $show_admin_bar ) ) { |
| 419 | if ( ! is_user_logged_in() || 'wp-login.php' == $pagenow ) { |
| 420 | $show_admin_bar = false; |
| 421 | } else { |
| 422 | $context = is_admin() ? 'admin' : 'front'; |
| 423 | $show_admin_bar = _get_admin_bar_pref( $context ); |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | $show_admin_bar = apply_filters( 'show_admin_bar', $show_admin_bar ); |
| 428 | |
| 429 | return $show_admin_bar; |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * Retrieve the admin bar display preference of a user based on context. |
| 434 | * |
| 435 | * @since 3.1.0 |
| 436 | * @access private |